перемещение gparted, освобожденное к 1-му разделу

Вы можете использовать bash builtin wait.
Три раза подождите -n, каждый раз проверяя состояние выхода.

От man bash:

    wait [-n] [n ...]
           Wait  for  each  specified child process and return its termination
           status.  Each n may be a process ID or a job  specification;  if  a
           job  spec is given, all processes in that job's pipeline are waited
           for.  If n is not given, all currently active child  processes  are
           waited  for,  and  the  return status is zero.  If the -n option is
           supplied, wait waits for any job to terminate and returns its  exit
           status.   If  n specifies a non-existent process or job, the return
           status is 127.  Otherwise, the return status is the exit status  of
           the last process or job waited for.